Ivan,Bob and Jack -solitary confinement

Ivan,Bob and Jack are put in solitary confinement by a judge, but he says they can each take one thing in with them. Ivan takes his wife (the judge had to agree), Bob took his phone and Jack got out his calculator, worked something out and took 3,000 cartons of cigarettes.After the 10 years were up Ivan came out with his wife and 12 children they had, Bob announced he was now a millionaire through a business he had started over the phone, Jack came out and asked, "Anyone got a lighter?".